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Issue #23731: Implement PEP 488.

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The concept of .pyo files no longer exists. Now .pyc files have an
optional `opt-` tag which specifies if any extra optimizations beyond
the peepholer were applied.
This commit is contained in:
Brett Cannon 2015-04-13 14:21:02 -04:00
parent a63cc21234
commit f299abdafa
56 changed files with 4731 additions and 4621 deletions
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11
Lib/py_compile.py
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@ -1,4 +1,4 @@
"""Routine to "compile" a .py file to a .pyc (or .pyo) file.
"""Routine to "compile" a .py file to a .pyc file.
This module has intimate knowledge of the format of .pyc files.
"""
@ -67,7 +67,7 @@ def compile(file, cfile=None, dfile=None, doraise=False, optimize=-1):
:param file: The source file name.
:param cfile: The target byte compiled file name. When not given, this
defaults to the PEP 3147 location.
defaults to the PEP 3147/PEP 488 location.
:param dfile: Purported file name, i.e. the file name that shows up in
error messages. Defaults to the source file name.
:param doraise: Flag indicating whether or not an exception should be
@ -85,12 +85,12 @@ def compile(file, cfile=None, dfile=None, doraise=False, optimize=-1):
Note that it isn't necessary to byte-compile Python modules for
execution efficiency -- Python itself byte-compiles a module when
it is loaded, and if it can, writes out the bytecode to the
corresponding .pyc (or .pyo) file.
corresponding .pyc file.
However, if a Python installation is shared between users, it is a
good idea to byte-compile all modules upon installation, since
other users may not be able to write in the source directories,
and thus they won't be able to write the .pyc/.pyo file, and then
and thus they won't be able to write the .pyc file, and then
they would be byte-compiling every module each time it is loaded.
This can slow down program start-up considerably.
@ -105,8 +105,9 @@ def compile(file, cfile=None, dfile=None, doraise=False, optimize=-1):
"""
if cfile is None:
if optimize >= 0:
optimization = optimize if optimize >= 1 else ''
cfile = importlib.util.cache_from_source(file,
debug_override=not optimize)
optimization=optimization)
else:
cfile = importlib.util.cache_from_source(file)
if os.path.islink(cfile):